Marcus m



MARCUS VAMMIDOWN, oF BOSTON, MASSACHUSETTS.

Leraars Paten: No. 82,674, daad causerie, 186e.

TMPeovnD Mone Aor TnANsMITTINe. MoTIoN.

atte @stimule referat it in time Entert martini mating part ni 'tigt time,

Be it known that I, MARCUS-M. AMMinowN, of Boston, in the county of Suffolk, and State of Massachusetts,

have invented a new and improved Mode of Transmitting Motion, of which'the following -is al'ull, clear', and "exact description, reference being had to the accompanying drawings, making a part of' this specification, in

whiohl Figure 1 represents a vertical longitudinal section of a device embodying my invention.

Figure 2 is a side elevation of the same.

Figures 3 and 4 are transverse sections, on the linezy of g. 1, showing the dier'ent positions of the V-sbaped'pawl in relation to the toothed wheel.

Figures 5 and 6 are detail views of the spring which vis attached to the V-shaped pawl.

The nature of my invention consists in a mode of transmitting motion, by means of a V-shaped pawl, in combination with a'toothed wheel, the spaces between the teeth of which conformto the point'of the said p'awl, the latterrbeing arranged within a shell, a portion of which is made eccentric to the toothed wheel or shaft upon which' the wheel is fixed, so that, as the shell is turned upon a separate hub or shaft which holds the gear-V' wheel or pulley'from which it receives its motion, the eccentricity of the shell will cause the V-shaped pawl Yto engage with or be released fromjthe toothed wheel, and thus impart motion to the shaft whenever required.

Referring to the drawings, s representsa4 shaft, to which it may be desirable to vtransmit motion, and is arranged in a frame in any suitable manner. l i

a is a hub, surrounding .the shaft,and`iitted loosely on the same, so as' to allow` a freerotation to the shaft. c is a gear-wheel, attached to or forming a part of the said hub, and is made to rotate by means of the worm-gear b, by the application of any suitable power. I

Surrounding the hub a, andv fitting snugly on the same, but so as to admit of a free rotary motion, is a shell, el, extending below the hub a a short distance, as from 2' to kin' iig. 1. The hub d is made concentric with the shell d.v -u Y At the lower end of the hub ais attached a pawl, e, made with a V-shaped inner edge,.as shown in figs. 3 and 4, and extending downwards to the Alower end of the shell ci. Thelpawl e is allowed a limited motion towards and from the centre of the shaft, and attached to it is a curved spring, g, as seen in fig. 5, inserted in a recess in the hub a, which serves to force the pawl away from the toothed wheelf. Instead of the curvedspring, the pawl may extend upwards in a recess in the hub a, and be pressed out by a straight spring arranged within the The space in the lowerA portion of the shell d, in which the pawl e is fitted, is made eccentric to the portion above and to the shaft s, as seen in figs. 3 and 4. Within this eccentric-space is also arranged a toothed wheehf, fixed to the shaft s.

The eccentricity of the lower portion of the sleeve d is lsuch that upon being rotated the paWl will be forced4 into or ont of contact with the toothed wheel f, as desired, and thus communicate or transmit motion to the shafts at pleasure. V K l The spaces between the teeth ofthe wheelf are made to conform to the wedge-shaped point of the pawl,

and thus serve to force the latter out of gear with the wheel' when the pressure exerted by the eccentric is removed fromvthe pa'wl. l l

The pawl may at any time be readily thrown in or out of gear with the .toothed wheel, thus transmitting motion to the shaft, or stopping the same at any moment desired.

The device is particularly applicable in all machines where a feed-motion is required.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination of the hub a and the cylindricalV shell cl, provided with the eccentric, d', substantiallyv as and for the purpose set forth. p

2. The combination, with the eccentric, d', of-the pawl e,and toothed Whcelf, substantially as and for the lpurpose specified. Y

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

M. AMMTDOWN.

Witnesses:

J. H. ADAMS, I EDw. F. ADAMS. e 

